NexSens M550 and M650 Solar Marine Lights purchased with CB-Series data buoys will most often arrive pre-programmed for use. This article highlights the most commonly used IR remote codes. Note that  activation commands need to be sent with the remote facing the side of the beacon. If no response to the below commands are elicited, try changing the angle of the remote with respect to the beacon.


CommandM550 BeaconM650 Beacon
Activate RemoteHold PWR button for 2 seconds Hold PWR button for 2 seconds
Unlock Code N/A 

PWR 753 √

*must be sent before                       the first command*



Power On                                             (Will illuminate, dim to strong- blink for 1 min, resume flashing in dark conditions)



Hold PWR button for 4 seconds*Set desired flash code
Power Off                                                 (Will illuminate, slowly fade)Hold PWR button for 6 secondsPWR 000 √
Check Battery Status PWR 810 √ PWR 810 √
Check Battery Response3 flashes- Good

2 flashes- Charge

1 flash- Low

10 flashes- Good

7 flashes- Charge

4 flashes- Replace


Flash Code- 1 blink every 4 sec


PWR 066 √


PWR 066 √


*For the M650 beacon, the effective intensity setting  determines which flash codes will be sustainable given the solar recharge capability. For example the 066 Flash Code will not be accepted with the default 25cd intensity setting and must be reduced to at least 15cd for it to be applied. Once the intensity is reduced via the display interface at the base of the beacon it will be possible to then set the code.


More detailed commands for each beacon can be found in its user guide.

M550 Manual

M650 Manual


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